Improvement in insulators for lightning-rods



PATENTED AUG. 26, 1851.

y G. W. ons. 5

INSULATOR PQR LIGHTNING Bons.

Swim@ 1HE Nmzms PETERS co.,wAsm:varoN. o. c.

collar.

UNITED STATES PATENT OFFICE.

GEO. W. OTIS, POF LYNN, MASSACHUSETTS.

lMPRovEMENT IN 'lNsuLA'roRs Fon 'LIGHTNING-nobel Specification forming pavrt of Letters Patent No., 8,316, dated August 26, 1851.

' To all whom it/may concern:

Be it knownY that I, GEORGE. W. O'rrs, of Lynn, in the' countyT of Essex and State of Massachusetts, have invented a new and Improved Mode of Atta'chin'g Lightning-Rods to lBuildings byMeans of Glass Isolators; and I do hereby declare that the 4following is a full and exact description;

"This invention Vconsistsfn't three parte, toA wit: first, a solid'glass cyli-nder second, a

metallic point or conductor, thir a wooden Said cylinder is one and a half inch in diametr and two inches in length,havingin one end' a bore threequarters of an inch in depth,\ in which to fix said point or conductor, and

around the edge of the other end alip or ange one-eighth of an inch in width and one-quarter of an inch in th1ckness,byv Whichto be kept in its place by the collar.

Said point or conductor is fixed in said bore in the cylinder, and extends horizontally therefrom four inches.. The first three-quarters ofen inch thereof from the end o f` the cylinder is .square, having an opening through' for the passage of the lightning-rod. Thence it ta pers to a point.

Said collar is round', and is made, by means of a circular groove inside, to fit over and around saidcylinder and lip or ange, so that its base and the base of said cylinder present a'uniform surface.

@he three parts being thus put together constitute theisolator, which -is to be fastened rectangularly to the buildin by means of screws o'rnails through the co lar. The light- 'ni'ng-rod is' then passed up theside of the building through said opening in the point or conductor.

- :The oce'of the collar is to fasten the cylindem-and point 'or conductor to the building.

The .oiiee of the glass cylinder is, by isolation, to preventvthe passage of electricity from the lightningrod to the building.'

The' oce of the metallic'pontor conductor is to secure the lightning-rod and to divert and dissipate'the electricity.

As many of the isolators are to be used inV evey case as may be necessary to support the lightning-r0d.

What 1 claim as my invention is- The insulated support and point for lightning-rods, consisting of the insulated point,

and opening in its shank, the insulating-cylin-` der of glass, with its lip or Bange, and the wooden collar for securing the whole to the building, all as described.

GEORGE w. o'ris. y

Witnesses Crus. W. STOEEY, SETH J. THOMAS. 

